Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Tang, Yuhu; Liang, Yao; Yao, Jin; Chen, Mu Ku; Lin, Shaopei; Wang, Zhuo; Zhang, Jing Cheng; Huang, Xu; Chen, Yu; Tsai, Din Ping

doi:10.1002/lpor.202200597

Cited by 89 publications

(46 citation statements)

References 59 publications

(99 reference statements)

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“…Recently, numerous chiral metasurfaces assisted by BICs lead to quasi‐BICs have been demonstrated in the literature. [ 94–104 ]…”

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

“…Reproduced with permission. [ 95 ] Copyright 2023, Author(s) Creative Commons Attribution (CC BY) license published by Wiley‐VCH GmbH. C) A dielectric chiral metasurface based on a pair of bars hosting BIC resonance exhibiting strong circular dichroism in a narrow band with maximum Q‐factor.…”

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

“…Recently, numerous chiral metasurfaces assisted by BICs lead to quasi-BICs have been demonstrated in the literature. [94][95][96][97][98][99][100][101][102][103][104] Wu et al demonstrated a honeycomb-shaped gold hole structure to design a plasmonic metasurface to generate strong circular dichroism triggered by near-field perturbation without breaking the rotational and mirror symmetry (Figure 5A). [94] Meanwhile, a rectangular hole structure is also demonstrated to prove the generation of strong chirality without breaking Society of America.…”

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

“…Most recently, Tang et al numerically demonstrated a 3D plasmonic metasurface to overcome the fundamental trade-off between the CD and the Q-factor in previously presented BICs-based chiral metasurfaces (Figure 5B). [95] The proposed metasurface used an integrated unit comprising a vertically twisted split ring resonator and a wall to introduce a new degree of freedom that can decouple the CD and Q-factor. Moreover, the independent manipulation of CD and the Q-factor is illustrated by changing the height of the wall and the angle of the vertically twisted split ring resonator.…”

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

“…The proposed metasurface used an integrated unit comprising a vertically twisted split ring resonator and a wall to independently manipulate the Q-factor and CD. Reproduced with permission [95]. Copyright 2023, Author(s) Creative Commons Attribution (CC BY) license published by Wiley-VCH GmbH.…”

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confidence: 99%

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Recent Progress on Plasmonic and Dielectric Chiral Metasurfaces: Fundamentals, Design Strategies, and Implementation

Khaliq

Nauman

Lee

2023

Advanced Optical Materials

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Over the years, researchers have been exploring ways to artificially design chiral structures and materials, namely metamaterials and metasurfaces. They exhibit unique optical properties that can be used for various applications. However, metasurfaces comprise symmetry‐breaking structures that provide a more convenient solution for planar chiral optics regardless of whether they are plasmonic or dielectric. In general, plasmonic chiral metasurfaces are more suitable for applications requiring a high confinement level and substantial optical near‐field enhancement. In contrast, dielectric chiral metasurfaces are ideal for wide operating wavelength ranges and low losses. This review summarizes the recent progress on plasmonic and dielectric chiral metasurfaces. It includes the fundamental concepts, design strategies, and their implementation for applications in holographic displays, imaging and sensing, and detection. Moreover, an overview of chiral metasurfaces to generate the nonlinear effects, hosting bound states in the continuum, and the significant role of machine‐learning‐based design approaches are also discussed. Finally, some future developments are highlighted where chiral metasurfaces are expected to play a vital role.

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“…Recently, numerous chiral metasurfaces assisted by BICs lead to quasi‐BICs have been demonstrated in the literature. [ 94–104 ]…”

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

Section: Chirality Empowered By Bound States In the Continuum (Bics)mentioning

confidence: 99%

mentioning

confidence: 99%

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Recent Progress on Plasmonic and Dielectric Chiral Metasurfaces: Fundamentals, Design Strategies, and Implementation

Khaliq

Nauman

Lee

2023

Advanced Optical Materials

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Nanoimprint Meta‐Device for Chiral Imaging

Zhang

Chen

Liang

et al. 2023

Adv Funct Materials

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The polarization of light is a valuable information channel that has been studied extensively in optical devices. There has been limited progress in developing low‐refractive index contrast and large‐scale chiral meta‐devices that are easy to integrate and mass‐produce. In this image, a chiral imaging meta‐device with a large area and broadband chirality control is experimentally demonstrated. The centimeter‐scale Moiré meta‐device is achieved using nanoimprint technology. The Poynting vector and singularity features in the near field and chiral optical response in the far field are discussed. The proposed Moiré meta‐devices can achieve circular dichroism (CD) of more than 10%. Further chiral imaging harnessing CD mechanisms are demonstrated, which may lead to significant potential in various fields, including encryption and security, materials science, biochemistry, and medicine.

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Deep‐Learning Empowered Customized Chiral Metasurface for Calibration‐Free Biosensing

Zhang,

Gao,

Wang

et al. 2024

Advanced Materials

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As a 2D metamaterial, metasurfaces offer an unprecedented avenue to facilitate light‐matter interactions. The current “one‐by‐one design” method is hindered by time‐consuming, repeated testing within a confined space. However, intelligent design strategies for metasurfaces, limited by data‐driven properties, have rarely been explored. To address this gap, a data iterative strategy based on deep learning, coupled with a global optimization network is proposed, to achieve the customized design of chiral metasurfaces. This methodology is applied to precisely identify different chiral molecules in a label‐free manner. Fundamentally different from the traditional approach of collecting data purely through simulation, the proposed data generation strategy encompasses the entire design space, which is inaccessible by conventional methods. The dataset quality is significantly improved, with a 21‐fold increase in the number of chiral structures exhibiting the desired circular dichroism (CD) response (>0.6). The method's efficacy is validated by a monolayer structure that is easily prepared, demonstrating advanced sensing abilities for enantiomer‐specific analysis of bio‐samples. These results demonstrate the superior capability of data‐driven schemes in photonic design and the potential of chiral metasurface‐based platforms for calibration‐free biosensing applications. The proposed approach will accelerate the development of complex systems for rapid molecular detection, spectroscopic imaging, and other applications.

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Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Cited by 89 publications

References 59 publications

Recent Progress on Plasmonic and Dielectric Chiral Metasurfaces: Fundamentals, Design Strategies, and Implementation

Recent Progress on Plasmonic and Dielectric Chiral Metasurfaces: Fundamentals, Design Strategies, and Implementation

Nanoimprint Meta‐Device for Chiral Imaging

Deep‐Learning Empowered Customized Chiral Metasurface for Calibration‐Free Biosensing

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